| 8. Round | 17/04/2021 | Albirex Niigata | - | Zweigen Kanazawa | 1:0 |  |
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| 9. Round | 21/04/2021 | Tochigi SC | - | Albirex Niigata | 2:2 | |
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| 10. Round | 24/04/2021 | Ehime FC | - | Albirex Niigata | 0:2 | ||||
| 11. Round | 01/05/2021 | Albirex Niigata | - | JEF United Chiba | 2:0 | ||||
| 12. Round | 05/05/2021 | RB Omiya Ardija | - | Albirex Niigata | 2:3 | ||||
| 14. Round | 16/05/2021 | FC Machida Zelvia | - | Albirex Niigata | 2:1 | ||||
| 18. Round | 13/06/2021 | Albirex Niigata | - | Fagiano Okayama | 0:1 | ||||
| 19. Round | 21/06/2021 | Blaublitz Akita | - | Albirex Niigata | 0:2 | |
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| 20. Round | 26/06/2021 | Albirex Niigata | - | Mito HollyHock | 0:0 | ||||
| 22. Round | 11/07/2021 | Albirex Niigata | - | Tochigi SC | 3:0 | ||||
| 23. Round | 17/07/2021 | Kyoto Sanga FC | - | Albirex Niigata | 1:1 | ||||
| 28. Round | 04/09/2021 | Albirex Niigata | - | Giravanz Kitakyushu | 0:0 | ||||
| 35. Round | 23/10/2021 | Albirex Niigata | - | Blaublitz Akita | 1:2 | ||||
| 36. Round | 31/10/2021 | Fagiano Okayama | - | Albirex Niigata | 1:1 | ||||
| 39. Round | 13/11/2021 | Albirex Niigata | - | Ehime FC | 2:0 |
Japan